82
Codec Priority 1~9
—
Codec stands for
“Compress-Decompress”. It converts the
analog voice signals to digital data packets. There are nine different codecs in the pull-
down menu. And each of them requires different bandwidth. Select one of them from the
drop-down menu for each priority. Codec Priority 1 is the highest priority. And code
priority 9 will is the lowest priority.
G.723 Rate
—
Select
6.3Kbps
or
5.3Kbps
from the drop-down menu to decide the
encoding rate for the G.723 Codec.
iLBC mode
—
Select
20msec.
or
30msec.
from the drop-down men for the iLBC mode.
The default setting is 30 msec.
DTMF Method
—
Choose
RFC2833
,
SIPINFO
or
INBAND
from the drop-down menu as
the DTMF Method. DTMF stands for
“Dual Tone Multiple Frequency”. It is used for
telecommunication signaling over analog telephone lines in the voice-frequency band
between telephone handsets and other communications devices and the switching
center. If you select
“RFC2833”, the Residential Gateway will send the DTMF tone as a
RTP payload signal. And it will have a higher tolerance for packet loss. If you select
“SIPINFO”, the Residential Gateway will send the DTMF tone via SIP INFO message. Or
if you select
“In-band”, the Residential Gateway will send the DTMF tone in voice packet.
Outband 2833 Payload type value
—
Select a value from the drop-down menu.
Voice Active Detector
—
If the voice being encoded is human speech or background
noise, select a mode from the drop-down menu to determine. Or select
Disable
to
deactivate this feature.
Line Echo Canceller Tail Length
—
Select Tail Length for line echo cancellation from
the drop-down menu. The echo canceller can remove your echo from the returning audio
stream without removing responder
’s voice.
Automatic Gain Control Tx Level
—
Select a transmitting AGC level from the pull-
down menu. Or select
Disable
to deactivate this feature.